Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
M550B377M075AA KEMET	CAP TANT POLY 370UF 75V CHAS MNT	0
T551B567K010AT4251 KEMET	CAP TANT POLY 560UF 10V AXIAL	0
T540B107K003DH87107610 KEMET	CAP TANT POLY 100UF 3V 1411	0
T521V336M025ATE060 KEMET	CAP TANT POLY 33UF 25V 2917	1642
T540B157M003CH8610 KEMET	CAP TANT POLY 150UF 3V 1411	0
T541X108K004AH8705 KEMET	CAP TANT POLY 1000UF 4V 2917	0
T521X106M075ATE050 KEMET	CAP TANT POLY 10UF 75V 2917	3123
T540D687K003BH8705WAFL KEMET	CAP TANT POLY 680UF 3V 2917	0
T540D687K2R5AH87057610 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
T540D336M030AH8710 KEMET	CAP TANT POLY 33UF 30V 2917	0
T541X686K0CT8610 KEMET	CAP TANT POLY 68UF 2917	0
T540B476M006BH8610WAFL KEMET	CAP TANT POLY 47UF 6.3V 1411	0
T541X476M030BT8510 KEMET	CAP TANT POLY 47UF 30V 2917	0
T540D226M030AT8705 KEMET	CAP TANT POLY 22UF 30V 2917	0
T520Y337M010ATE025 KEMET	CAP TANT POLY 330UF 10V 2917	1251
M550B347M030AG KEMET	CAP TANT POLY 340UF 30V CHAS MNT	0
T540D687M003DH87057610 KEMET	CAP TANT POLY 680UF 3V 2917	0
T520W686M010ATE040 KEMET	CAP TANT POLY 68UF 10V 2917	655
T540B157M003CH86107610 KEMET	CAP TANT POLY 150UF 3V 1411	0
T520C107M006ATE025 KEMET	CAP TANT POLY 100UF 6.3V 2312	1500

Tantalum - Polymer Capacitors

1. Overview

Tantalum polymer capacitors are a type of electrolytic capacitor utilizing conductive polymer as the electrolyte and tantalum metal as the anode. Compared to traditional liquid-electrolyte tantalum capacitors, they offer lower equivalent series resistance (ESR), higher thermal stability, and longer operational lifespan. Their ability to deliver stable capacitance in compact packages makes them critical components in modern electronics for power management, noise filtering, and energy storage.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Solid Polymer Electrolyte	Ultra-low ESR (<10m ), high ripple current tolerance	High-frequency DC-DC converters
Hybrid Polymer-Electrolyte	Combines polymer and liquid electrolyte for cost-performance balance	Consumer electronics power supplies
High-Voltage Polymer	Rated voltage >25V with enhanced dielectric strength	Industrial motor drives

3. Structure and Composition

Typical construction includes:

Anode: Sintered tantalum pellet with porous structure
Dielectric: Thin Ta₂O₅ layer formed via anodization
Electrolyte: Conductive polymer (e.g., PEDOT:PSS) coating
Cathode: Graphite/silver layered termination

The porous anode structure maximizes surface area while the polymer electrolyte provides solid-state reliability.

4. Key Technical Specifications

Parameter	Significance
Capacitance Range: 10 F - 1000 F	Determines energy storage capacity
Rated Voltage: 2.5V - 50V	Defines maximum operational voltage
ESR: <20m typical	Impacts power efficiency and thermal performance
Leakage Current: <0.01C*V	Affects battery-powered device standby consumption
Operating Temperature: -55 C to +125 C	Ensures reliability in harsh environments

5. Application Fields

Consumer Electronics: Smartphone power management modules
Automotive: Engine control units (ECUs) and ADAS systems
Industrial: Programmable logic controllers (PLCs)
Medical: Portable diagnostic equipment power filtering
Telecom: 5G base station RF amplifiers

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Vishay	T55 Series	2000 hours life at 105 C
AVX	TACMIC	Military-grade vibration resistance
KEMET	A700 Series	Automotive AEC-Q200 qualified

7. Selection Guidelines

Key considerations:

Capacitance-voltage (CV) product must exceed circuit requirements by 20%
ESR requirements for high-frequency noise suppression
Package size constraints (e.g., 3216 vs 7343)
Temperature derating: Reduce rated voltage by 30% at 125 C
Failure mode analysis for safety-critical applications

8. Industry Trends

Emerging developments include:

Nano-structured polymer electrolytes enabling 30% higher capacitance density
Low-flammability materials for EV battery management systems
Embedded capacitor technology for 5G RF modules
AI-driven accelerated life testing methods

Market demand is projected to grow at 6.2% CAGR through 2030, driven by automotive electrification and IoT device proliferation.